add parenthesis to U64_PRINTF_ARG macro

svn:r4642

src/common/compat.h

@@ -77,7 +77,7 @@ size_t strlcpy(char *dst, const char *src, size_t siz);
 #define U64_FORMAT "%I64u"
 #define U64_LITERAL(n) (n ## ui64)
 #else
-#define U64_PRINTF_ARG(a) ((long long unsigned int)a)
+#define U64_PRINTF_ARG(a) ((long long unsigned int)(a))
 #define U64_SCANF_ARG(a) ((long long unsigned int*)a)
 #define U64_FORMAT "%llu"
 #define U64_LITERAL(n) (n ## llu)